Author
Listed:
- Saman Moniri
(University of California, Los Angeles)
- Yao Yang
(University of California, Los Angeles)
- Jun Ding
(Xi’an Jiaotong University)
- Yakun Yuan
(University of California, Los Angeles)
- Jihan Zhou
(University of California, Los Angeles)
- Long Yang
(University of California, Los Angeles)
- Fan Zhu
(University of California, Los Angeles)
- Yuxuan Liao
(University of California, Los Angeles)
- Yonggang Yao
(University of Maryland)
- Liangbing Hu
(University of Maryland)
- Peter Ercius
(Lawrence Berkeley National Laboratory)
- Jianwei Miao
(University of California, Los Angeles)
Abstract
Medium- and high-entropy alloys (M/HEAs) mix several principal elements with near-equiatomic composition and represent a model-shift strategy for designing previously unknown materials in metallurgy1–8, catalysis9–14 and other fields15–18. One of the core hypotheses of M/HEAs is lattice distortion5,19,20, which has been investigated by different numerical and experimental techniques21–26. However, determining the three-dimensional (3D) lattice distortion in M/HEAs remains a challenge. Moreover, the presumed random elemental mixing in M/HEAs has been questioned by X-ray and neutron studies27, atomistic simulations28–30, energy dispersive spectroscopy31,32 and electron diffraction33,34, which suggest the existence of local chemical order in M/HEAs. However, direct experimental observation of the 3D local chemical order has been difficult because energy dispersive spectroscopy integrates the composition of atomic columns along the zone axes7,32,34 and diffuse electron reflections may originate from planar defects instead of local chemical order35. Here we determine the 3D atomic positions of M/HEA nanoparticles using atomic electron tomography36 and quantitatively characterize the local lattice distortion, strain tensor, twin boundaries, dislocation cores and chemical short-range order (CSRO). We find that the high-entropy alloys have larger local lattice distortion and more heterogeneous strain than the medium-entropy alloys and that strain is correlated to CSRO. We also observe CSRO-mediated twinning in the medium-entropy alloys, that is, twinning occurs in energetically unfavoured CSRO regions but not in energetically favoured CSRO ones, which represents, to our knowledge, the first experimental observation of correlating local chemical order with structural defects in any material. We expect that this work will not only expand our fundamental understanding of this important class of materials but also provide the foundation for tailoring M/HEA properties through engineering lattice distortion and local chemical order.
Suggested Citation
Saman Moniri & Yao Yang & Jun Ding & Yakun Yuan & Jihan Zhou & Long Yang & Fan Zhu & Yuxuan Liao & Yonggang Yao & Liangbing Hu & Peter Ercius & Jianwei Miao, 2023.
"Three-dimensional atomic structure and local chemical order of medium- and high-entropy nanoalloys,"
Nature, Nature, vol. 624(7992), pages 564-569, December.
Handle:
RePEc:nat:nature:v:624:y:2023:i:7992:d:10.1038_s41586-023-06785-z
DOI: 10.1038/s41586-023-06785-z
Download full text from publisher
As the access to this document is restricted, you may want to search for a different version of it.
Citations
Citations are extracted by the
CitEc Project, subscribe to its
RSS feed for this item.
Cited by:
- Ying Han & Hangman Chen & Yongwen Sun & Jian Liu & Shaolou Wei & Bijun Xie & Zhiyu Zhang & Yingxin Zhu & Meng Li & Judith Yang & Wen Chen & Penghui Cao & Yang Yang, 2024.
"Ubiquitous short-range order in multi-principal element alloys,"
Nature Communications, Nature, vol. 15(1), pages 1-13, December.
- Gerald Costa & Celia Castro & Antoine Normand & Charly Vaudolon & Aidar Zakirov & Juan Macchi & Mohammed Ilhami & Kaveh Edalati & François Vurpillot & Williams Lefebvre, 2024.
"Bringing atom probe tomography to transmission electron microscopes,"
Nature Communications, Nature, vol. 15(1), pages 1-7, December.
Corrections
All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:nature:v:624:y:2023:i:7992:d:10.1038_s41586-023-06785-z. See general information about how to correct material in RePEc.
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
We have no bibliographic references for this item. You can help adding them by using this form .
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .
Please note that corrections may take a couple of weeks to filter through
the various RePEc services.